import type { EChartsOption } from 'echarts'
import type { Ref } from 'vue'
import { tryOnUnmounted, useDebounceFn, useTimeoutFn } from '@vueuse/core'
import { computed, nextTick, ref, unref, watch } from 'vue'
import { useEventListener } from '@/hooks/event/useEventListener'
import { useBreakpoint } from '@/hooks/event/useBreakpoint'
import echarts from '@/utils/lib/echarts'
import { useRootSetting } from '@/hooks/setting/useRootSetting'
import { useMenuSetting } from '@/hooks/setting/useMenuSetting'

export function useECharts(elRef: Ref<HTMLDivElement>, theme: 'light' | 'dark' | 'default' = 'default') {
  const { getDarkMode: getSysDarkMode } = useRootSetting()
  const { getCollapsed } = useMenuSetting()

  const getDarkMode = computed(() => {
    return theme === 'default' ? getSysDarkMode.value : theme
  })
  let chartInstance: echarts.ECharts | null = null
  let resizeFn: Fn = resize
  const cacheOptions = ref({}) as Ref<EChartsOption>
  let removeResizeFn: Fn = () => {}

  resizeFn = useDebounceFn(resize, 200)

  const getOptions = computed(() => {
    if (getDarkMode.value !== 'dark')
      return cacheOptions.value

    return {
      backgroundColor: 'transparent',
      ...cacheOptions.value,
    } as EChartsOption
  })

  function initCharts(t = theme) {
    const el = unref(elRef)
    if (!el || !unref(el))
      return

    chartInstance = echarts.init(el, t)
    const { removeEvent } = useEventListener({
      el: window,
      name: 'resize',
      listener: resizeFn,
    })
    removeResizeFn = removeEvent
    const { widthRef, screenEnum } = useBreakpoint()
    if (unref(widthRef) <= screenEnum.MD || el.offsetHeight === 0) {
      useTimeoutFn(() => {
        resizeFn()
      }, 30)
    }
  }

  function setOptions(options: EChartsOption, clear = true) {
    cacheOptions.value = options
    return new Promise((resolve) => {
      if (unref(elRef)?.offsetHeight === 0) {
        useTimeoutFn(() => {
          setOptions(unref(getOptions))
          resolve(null)
        }, 30)
      }
      nextTick(() => {
        useTimeoutFn(() => {
          if (!chartInstance) {
            initCharts(getDarkMode.value as 'default')

            if (!chartInstance)
              return
          }
          clear && chartInstance?.clear()

          chartInstance?.setOption(unref(getOptions))
          resolve(null)
        }, 30)
      })
    })
  }

  function resize() {
    chartInstance?.resize({
      animation: {
        duration: 300,
        easing: 'quadraticIn',
      },
    })
  }

  watch(
    () => getDarkMode.value,
    (theme) => {
      if (chartInstance) {
        chartInstance.dispose()
        initCharts(theme as 'default')
        setOptions(cacheOptions.value)
      }
    },
  )

  watch(getCollapsed, (_) => {
    useTimeoutFn(() => {
      resizeFn()
    }, 300)
  })

  tryOnUnmounted(() => {
    if (!chartInstance)
      return
    removeResizeFn()
    chartInstance.dispose()
    chartInstance = null
  })

  function getInstance(): echarts.ECharts | null {
    if (!chartInstance)
      initCharts(getDarkMode.value as 'default')

    return chartInstance
  }

  return {
    setOptions,
    resize,
    echarts,
    getInstance,
  }
}
